Description
Product Overview
The Fleece Performance Duramax 6.6L CP3 Adapter Kit is engineered for exact fitment on GM Duramax engines. Constructed from high‑grade machined aluminum, the kit includes all necessary O‑rings to seal the air‑conditioning system, eliminating the need for aftermarket improvisations. Weighing just 1.09 lb and packaged in a compact 7.4 × 5.55 × 3.27 in box, it offers a lightweight yet robust solution for demanding applications.
Usage
Designed for professional mechanics and experienced DIYers, this adapter kit is ideal for heavy‑duty trucks, commercial fleets, and off‑road vehicles that rely on a dependable air‑conditioning system. Install the kit during routine maintenance or when replacing a faulty CP3 component to restore optimal cooling performance. 
Why Choose Us
Fleece Performance combines precision engineering with rigorous quality control, ensuring each kit meets OEM specifications. Our machined aluminum construction resists corrosion and wear, while the pre‑installed O‑rings guarantee a leak‑free seal. Backed by a 5‑star customer rating, this kit delivers confidence and longevity for your vehicle.
Key Features
- Precision‑machined aluminum for superior strength and lightweight design
- Includes all required O‑rings for a complete, ready‑to‑install solution
- Exact OEM fit for Duramax 6.6L CP3 systems, eliminating modification needs
- Corrosion‑resistant material ensures long‑term durability in harsh environments
- Compact packaging for easy storage and handling
FAQ
Does this kit include the O‑rings?
Yes, the kit comes with all necessary O‑rings pre‑installed, providing a complete seal for the air‑conditioning system.
Is the adapter compatible with all 6.6L Duramax models?
The kit is designed for the GM Duramax 6.6L CP3 configuration and fits all standard applications of this engine series.
What tools are required for installation?
Standard hand tools such as a torque wrench, screwdrivers, and a socket set are sufficient for installing the adapter kit.
Can I install this kit myself?
Yes, experienced DIYers can install the kit following the included instructions; however, professional installation is recommended for optimal results.
What warranty does Fleece Performance offer?
The product is covered by a limited one‑year warranty against manufacturing defects.








Polar Tech TP6/MS Ice Brix Viscous Gel Moisture Safe Refrigerant Cold Pack, 4" Length x 6" Width x 3/4" Thick (Case of 48), White
GM Genuine Parts Air Conditioning O‑Ring 24504031 Seal for Chevrolet
Green Rubber O Ring Kit POVAST 270 pcs 18 Sizes for Auto AC
A/C Compressor O Ring Kit bylikeho 60-Piece Silver Rubber Set 15.2mm
Captain O-Ring 91319-PAA-A01 3-Pack Automotive AC O-Ring Set
Fel-Pro Automotive Fuel Injection Plenum Gaskets
Victor Reinz MS17810 Fuel Injection Plenum Gasket
Reswish O Ring Assortment 270pcs Green 18 Sizes Rubber Seal Kit
O Ring Gasket AC Seal Kit Four Seasons Model 26738 Rubber
Reviews
There are no reviews yet.